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Grace [21]
2 years ago
10

Use Target Reading Skills After you read the section, reread the paragraphs that contain definitions of Key Terms. Use all of th

e information you have learned to write a meaningful sentence using each Key Term. a. chemical equation:​
Chemistry
1 answer:
Ksju [112]2 years ago
3 0
A_______________________
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What gives the gem amethyst its purplish color?
Alina [70]
iron Presence of trace elements, irradiation and iron impurities give the gem amethyst its purplish color!
7 0
2 years ago
2. HOW MUCH HEAT IS REQUIRED TO BE RELEASED WHEN
jarptica [38.1K]

Answer: -112200J

Explanation:

The amount of heat (Q) released from an heated substance depends on its Mass (M), specific heat capacity (C) and change in temperature (Φ)

Thus, Q = MCΦ

Since,

Q = ?

Mass of water vapour = 30.0g

C = 187 J/ G°C

Φ = (Final temperature - Initial temperature)

= 100°C - 120°C = -20°C

Then apply the formula, Q = MCΦ

Q = 30.0g x 187 J/ G°C x -20°C

Q = -112200J (The negative sign does indicates that heat was released to the surroundings)

Thus, -112200 joules of heat is released when cooling the superheated vapour.

5 0
3 years ago
A force is applied but nothing happens
Lana71 [14]
If a force is applied but nothing happens, then it means that the forces are balanced. Being at such state, <span>equal forces are acting on an object in opposite directions. Hope this answers the question. Have a nice day. Feel free to ask more questions.</span>
7 0
2 years ago
What does a net ionic equation show about a reaction
AVprozaik [17]

Answer:

A net ionic equation shows only the chemical species that are involved in a reaction, while a complete ionic equation also includes the spectator ions.

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6 0
3 years ago
If you have 222 g of radioisotope with a half-life of 5 days, how much isotope would remain after 15 days?
Dima020 [189]
If the half life is 5 days, you would have to divide 222 by 2 3 times.
so 222/2 =111g
111/2 = 55.5g
55.5/2 = 27.75g

after four half life the mass would be
27.75/2
13.875g

the percent would be
13.875/222
= 6.25%
7 0
3 years ago
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